The given table shows the genetic codes of two different amino acids which exemplifies one of the features of genetic codes. Which of the following statements is CORRECT about this feature?
Correct answer: A. Genetic codes are redundant
- A. Genetic codes are redundant
- B. Genetic codes are ambiguous
- C. Each amino acid has only one genetic code
- D. Three genetic codes are used for stop signal
Explanation
The correct answer is that genetic codes are redundant. This means that multiple codons can encode the same amino acid, providing a buffer against mutations that might otherwise change protein sequences. Option A is correct because it directly addresses this characteristic of redundancy. Option B is incorrect as the genetic code is not ambiguous; each codon corresponds to a single amino acid. Option C is incorrect because the redundancy of the genetic code means that most amino acids are associated with multiple codons. Lastly, Option D, although true regarding stop codons, does not pertain to the redundancy aspect of the genetic code.
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DNA structure includes nucleotides made of deoxyribose, phosphate and nitrogenous bases, arranged in two antiparallel polynucleotide strands. Questions cover the double helix, phosphodiester and hydrogen bonds, complementary base pairing between adenine and thymine and between guanine and cytosine, and the significance of major and minor grooves.
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